Norton Windoctor is one of many programs designed to generate panic and induce a loss of confidence in your computer by giving you loads of information which may or may not be true but in all likelihood you don't require to know anyway.
The important thing is does your computer operate in the way it is supposed to? If it does, forget Norton and concentrate on the things your machine is supposed to do - that is compute!
Remember - Zillions of computers operate without the "benefits" of this, and similar, programs. Yours will as well.
If you are having any real problems, come back here and someone will almost certainly be able to sort them out for you.